Meet Our Medical College of Wisconsin Gastroenterology and Hepatology Teams
Faculty

Reza Shaker, MD
Assoc Provost, Sr Assoc Dean, Ctr Dir, Chief, Prof

Dilpesh S. Agrawal, MD, MRCP
Assistant Professor

Helmut Ammon, MD
Adjunct Professor

Gokulakrishnan Balasubramanian, MD
Associate Professor

Poonam Beniwal-Patel, MD
Associate Professor

William L. Berger, MD
Associate Professor

Phillip Chisholm, MD
Assistant Professor

Francis Edeani, MD
Assistant Professor

Jose Franco, MD
Senior Associate Dean; Professor of Medicine

Ivan M. Lang, PhD, DVM
Adjunct Professor

Veronica Loy, DO
Associate Professor

Srivats Madhavan, MD
Assistant Professor

Benson T. Massey, MD
Professor

Bidyut K. Medda, PhD
Associate Professor

Ling Mei, MD
Associate Professor

James B. Nelson, MD
Adjunct Assistant Professor

Matthew T. Peller, MD
Assistant Professor

Kia Saeian, MD, MSc EPI
Professor

Patrick Sanvanson, MD
Associate Professor of Medicine

Zachary Smith, DO, MSc
Associate Professor

W. Harley Sobin, MD
Adjunct Assistant Professor

Achuthan Sourianarayanane, MD, MRCP, FOMA
Associate Professor

Daniel J. Stein, MD
Director, Associate Professor

Phaedra Tachtatzis, MD, MRCP, MBChB
Associate Professor

Juan Pablo Trivella, MD
Assistant Professor

Hassaan Zia, MD
Assistant Professor
Physician Assistants & Nurse Practitioners

Kenneth Christensen, PA-C
Physician Assistant

Sara L. Duthie, DNP, APNP, FNP-BC
Nurse Practitioner

Andrea Fetherston, APNP, MSN
Nurse Practitioner

Casey J. Fisher, BSN, MSN, APNP
Nurse Practitioner

Kristin M. Granlund, PA-C
Physician Assistant

Kathryn Johnson, MPAS, PA-C
APP Outpatient

Corinne Lange, APNP, FNP-C
Nurse Practitioner

Pamela Papenfuss, APNP, MSN, FNP
APP Outpatient

Scott D. Ramirez, DNP, APNP, NP-C
Nurse Practitioner

Bryanne M. Sekeres, MSN, FNP-BC, APNP
Nurse Practitioner

Margo R. Gengler, PA-C
Physician Assistant

Miranda Waraxa, APNP, MSN
APP Outpatient
Community-Based Physicians & Advanced Practice Providers

Cristino C. Canga, MD
Staff Physician

Peter Eichenseer, MD
Staff Physician

Raman Khanna, MD
Staff Physician

Syed H. Mehdi, MD
Staff Physician

Madhuri H. Trivedi, MD
Staff Physician

Denine E. Murn, PA-C, MPAS
APP Outpatient

Emily Bartel, APNP
Nurse Practitioner

Lynn M. Giovetti, PA-C
Physician Assistant

Sara E. Glapa, APNP, MSN, BS
Nurse Practitioner

Michael J. Kosnik, PA-C
APP Outpatient

Kaitlin A. Meier, APNP, DNP
APP Outpatient
